Date: Mon, 16 Mar 2015 17:01:45 -0700 From: Charles Swiger <cswiger@mac.com> To: David Benfell <benfell@parts-unknown.org> Cc: questions@freebsd.org Subject: Re: sonewconn: pcb 0xfffff801efdd1000: Listen queue overflow: 31 already in queue awaiting acceptance Message-ID: <457B9A78-1A87-4CE9-BBD0-5813BDA352CE@mac.com> In-Reply-To: <20150316234857.GA3587@home.parts-unknown.org> References: <20150316213018.GA97580@home.parts-unknown.org> <22987F08-3543-43BE-A06A-78E76437ADD2@mac.com> <20150316234857.GA3587@home.parts-unknown.org>
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On Mar 16, 2015, at 4:48 PM, David Benfell <benfell@parts-unknown.org> = wrote: > On Mon, Mar 16, 2015 at 03:38:51PM -0700, Charles Swiger wrote: >>=20 >> They aren't directly related. You generally need to increase = apc.shm_size >> suitable for however many PHP processes you're running-- generally = via mod_php >> in Apache or fastcgi for nginx and the like. >=20 > I *am* running a bunch of php-fpm processes. Is there a formula for > calculating this? There's an apc.php script which will look at your APC stats. >> The listen queue overflow means that your system is failing to = process >> incoming requests fast enough to keep up. The bottleneck could be >> on a resource like CPU or memory, or serialization against a database >> table, or something else. (You'll want to identify the bottleneck.) >=20 > Interesting. htop says I've got plenty of memory and CPU--it's a new > server and I went big. That would seem to suggest mysql may not be > performing well, which is a very strong possibility. Until relatively > recently, I was trying to run on a VPS and then a rather small hosted > server; I don't think I've revisited the mysql configuration since. >=20 > Thank you very much. All this helps. mysql is a likely candidate, particularly if it was an old setup and has not been tuned for the workload. For example, MyISAM is adequate for read-mostly stuff, but table-level locking tends to become a real = problem if you have more than a single admin instance doing writes. http://dev.mysql.com/doc/refman/5.7/en/table-locking.html Regards, --=20 -Chuck
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